test updates

Author: jorisvandenbossche

pandas/_testing/__init__.py

@@ -501,6 +501,8 @@ def shares_memory(left, right) -> bool:
     if isinstance(left, MultiIndex):
         return shares_memory(left._codes, right)
     if isinstance(left, (Index, Series)):
+        if isinstance(right, (Index, Series)):
+            return shares_memory(left._values, right._values)
         return shares_memory(left._values, right)
 
     if isinstance(left, NDArrayBackedExtensionArray):

pandas/tests/frame/test_reductions.py

@@ -1047,7 +1047,6 @@ def test_sum_bools(self):
     # ----------------------------------------------------------------------
     # Index of max / min
 
-    @pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
     @pytest.mark.parametrize("axis", [0, 1])
     def test_idxmin(self, float_frame, int_frame, skipna, axis):
         frame = float_frame

pandas/tests/series/methods/test_reindex.py

@@ -23,7 +23,7 @@
 def test_reindex(datetime_series, string_series):
     identity = string_series.reindex(string_series.index)
 
-    assert np.may_share_memory(string_series.index, identity.index)
+    assert tm.shares_memory(string_series.index, identity.index)
 
     assert identity.index.is_(string_series.index)
     assert identity.index.identical(string_series.index)

pandas/tests/series/methods/test_to_csv.py

@@ -4,8 +4,6 @@
 import numpy as np
 import pytest
 
-from pandas._config import using_string_dtype
-
 import pandas as pd
 from pandas import Series
 import pandas._testing as tm
@@ -26,7 +24,6 @@ def read_csv(self, path, **kwargs):
 
         return out
 
-    @pytest.mark.xfail(using_string_dtype(), reason="TODO(infer_string)")
     def test_from_csv(self, datetime_series, string_series, temp_file):
         # freq doesn't round-trip
         datetime_series.index = datetime_series.index._with_freq(None)